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Laser power dependence of the Beutler-Fano profiles for the autoionizing Rydberg states of Ba

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Abstract

The change of the Beutler-Fano profiles of the asymmetric autoionizing lines of barium as a function of the excitation laser power was investigated. Utilizing two-photon absorption, the J = 0 and 2 levels of a few members of the 5d3/2 nd3/2 autoionizing Rydberg series above the first ionization limit of barium were excited in a heat-pipe oven. As the laser power was changed, the transitions with relatively symmetric lineshapes showed the expected power broadening. However, the transitions with asymmetric lineshapes experienced a dramatic profile change while displaying a less significant power broadening. The remarkable profile changes are attributed to the interference between different ionization channels even at the highest excitation laser power.

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Authors and Affiliations

  1. Department of Physics, Kuwait University, P.O. Box 5969, 13060, Safat, Kuwait

    Kourosh Afrousheh

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  1. Kourosh Afrousheh
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Correspondence to Kourosh Afrousheh.

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Afrousheh, K. Laser power dependence of the Beutler-Fano profiles for the autoionizing Rydberg states of Ba. Eur. Phys. J. Plus 129, 254 (2014). https://doi.org/10.1140/epjp/i2014-14254-4

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  • DOI: https://doi.org/10.1140/epjp/i2014-14254-4

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